big slowdown lately

::::::::::.. Download Stats ..::::::::::
Connection is:: 1239 Kbps about 1.2 Mbps (tested with 1496 KB)
Download Speed is:: 151 kB/s
Tested From:: http://www.testmy.net/
Bottom Line:: 22 times faster than 56K you can download 1MB in 6.78 second(s)
Validation Link:: http://testmy.net/cgi-bin/get.cgi?Test_ID=XLGFJCEEN

for the last 3 days this has been about my speed.This is actually 1 of the faster tests lately.
Normally I test between 2.6 and 3.2, my rated speed per charter is 3mb.I have charter pipeline and test it at least every couple of weeks, or when I notice a slow down. 3 days ago I noticed a slowdown. I called charter and they report no problems. The only thing I have changed is installing sp2.
I have a Linksys modem (befcmu10), and a d-link router(di-704p), with 3 computers and a netgear (ps121)
printserver.
I always test good even when all computers are in use, now,
the other 2 are off and I still am testing slow.
I even bypassed the router with no change.
Thanks for looking

1. Your Tweakable Settings:
Receive Window (RWIN): 75504
Window Scaling: 1
Path MTU Discovery: ON
RFC1323 Window Scaling: ON
RFC1323 Time Stamping: OFF
Selective Acks: ON
MSS requested: 1452
TTL: unknown
TTL remaining: 51

2. Test 146000 byte download
Actual data bytes sent: 150356
Actual data packets: 104
Max packet sent (MTU): 1492
Max packet recd (MTU): 1492
Retransmitted data packets: 3
sacks you sent: 42
pushed data pkts: 4
data transmit time: 0.558 secs
our max idletime: 95.6 ms
transfer rate: 132651 bytes/sec
transfer rate: 1061 kbits/sec
This is not a speed test!
transfer efficiency: 97%